Feat: Scratch MCP tool calling support. (#8263)

### What problem does this PR solve?

This is a cherry-pick from #7781 as requested.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/interfaces/database/mcp-server.ts

@@ -0,0 +1,19 @@
+export enum McpServerType {
+    Sse = 'sse',
+    StreamableHttp = 'streamable-http',
+}
+
+export interface IMcpServerVariable {
+    key: string;
+    name: string;
+}
+
+export interface IMcpServerInfo {
+    id: string;
+    name: string;
+    url: string;
+    server_type: McpServerType;
+    description?: string;
+    variables?: IMcpServerVariable[];
+    headers: Map<string, string>;
+}